\begin{table}\centering \small \ssp 
 \begin{threeparttable}
 \caption{Results from congess-by-congress regressions analysis of labor roll call votes in the Senate (73rd--80th Congresses)} 
 \label{tab:rc_probits} 
\begin{tabular}{ld{-1}d{-1}d{-1}d{-1}d{-1}d{-1}} 
 \toprule 
 \midrule 
& \multicolumn{1}{c}{Intercept} & \multicolumn{1}{c}{Union} & \multicolumn{1}{c}{AA\%} & \multicolumn{1}{c}{Urban \%} & \multicolumn{1}{c}{Labor Comm.} &  \multicolumn{1}{c}{Democrat} \\ 
73rd,Deep South &  0.162  &  -0.018  &  0.004  &  0.005  &  1.058 ^{*} & \cdot \\
 74th,Deep South &  0.777  &  1.466  &  -0.047  &  0.002  &  -0.463  & \cdot \\
 75th,Deep South &  4.448 ^{*} &  1.857 ^{*} &  -0.157 ^{*} &  -0.074 ^{*} &  2.012 ^{*} & \cdot \\
 76th,Deep South &  2.726  &  -1.637  &  0.046  &  -0.054  &  7.144  & \cdot \\
 77th,Deep South &  -0.75  &  -0.006  &  0.011  &  0.007  &  0.478  & \cdot \\
 78th,Deep South &  -1.558  &  0.281  &  -0.009  &  0.013  &  0.345  & \cdot \\
 79th,Deep South &  -1.621 ^{*} &  0.047  &  0.014  &  0.009  &  0.635 ^{*} & \cdot \\
 80th,Deep South &  3.282 ^{*} &  0.165 ^{*} &  -0.062 ^{*} &  -0.043 ^{*} &  1.427 ^{*} & \cdot \\
 
 \midrule 
73rd,Border South &  2.351 ^{*} &  -0.071  &  -0.047 ^{*} &  -0.037 ^{*} & \cdot  & \cdot \\
 74th,Border South &  1.314  &  0.089  &  -0.026 ^{*} &  -0.031  & \cdot  & \cdot \\
 75th,Border South &  4.277 ^{*} &  -0.249 ^{*} &  -0.039 ^{*} &  -0.128 ^{*} &  -0.51  & \cdot \\
 76th,Border South &  2.447 ^{*} &  0.047  &  -0.022  &  -0.108 ^{*} &  4.518  & \cdot \\
 77th,Border South &  2.331  &  0.127  &  -0.041  &  -0.062  &  3.535  & \cdot \\
 78th,Border South &  -0.242  &  0.066  &  -0.007  &  -0.027  &  1.663 ^{*} & \cdot \\
 79th,Border South &  0.224  &  0.04 ^{*} &  -0.01 ^{*} &  -0.024 ^{*} &  0.388 ^{*} & \cdot \\
 80th,Border South &  1.567 ^{*} &  -0.016  &  -0.029 ^{*} &  -0.052 ^{*} &  -0.668 ^{*} & \cdot \\
 
 \midrule 
73rd,Non-South &  0.573 ^{*} &  0.154 ^{*} &  -0.027 ^{*} &  -0.005  &  0.448 ^{*} &  1.582 ^{*} \\
 74th,Non-South &  -0.274  &  0.022  &  -0.003  &  -0.016  &  0.031  &  0.875 ^{*} \\
 75th,Non-South &  -0.67 ^{*} &  0.045 ^{*} &  0.001  &  -0.049  &  0.345 ^{*} &  0.721 ^{*} \\
 76th,Non-South &  -0.367  &  0.241 ^{*} &  -0.011  &  -0.055  &  0.184  &  0.573 ^{*} \\
 77th,Non-South &  -1.025 ^{*} &  0.052  &  -0.017 ^{*} &  0.128 ^{*} &  0.333  &  1.419 ^{*} \\
 78th,Non-South &  -0.793 ^{*} &  0.091 ^{*} &  -0.008 ^{*} &  -0.016 ^{*} &  0.103  &  0.942 ^{*} \\
 79th,Non-South &  -0.471 ^{*} &  0.063 ^{*} &  -0.013 ^{*} &  -0.007 ^{*} &  0.676 ^{*} &  1.395 ^{*} \\
 80th,Non-South &  -0.801 ^{*} &  -0.005  &  -0.003  &  0  &  0.339 ^{*} &  2.71 ^{*} \\
 \\ \bottomrule 
 \end{tabular}
 \begin{tablenotes} 
 \item 
 {\em Notes}: \ssp $^* p \leq .1$. Table entries are probit maximum likelihood coefficient estimates. \textit{Union} indicates union density, \textit{AA} indicates percent African-American, \textit{Urban} indicates percent urbanization, and \textit{Labor Committee} and \textit{Democrat} refer to dummy variables indicating membership on the labor committee and in the Democratic party, respectively. 
 \end{tablenotes} 
 \end{threeparttable} 
 \hspace{\fill} 
 \end{table}
 
 
